Method and apparatus for transmitting data and communication system

ABSTRACT

An apparatus and method for transmitting data of vehicle communication (V2X) services and a communication system. The apparatus includes: a first generating unit configured in a media access control (MAC) layer of the terminal equipment and configured to generate at least one protocol data unit (PDU) in a mode identical to a transmission mode to which a service data unit (SDU) contained in a PDU corresponds; and a first transmitting unit configured in the MAC layer and configured to transmit the PDU to a physical layer of the terminal equipment, and notify the transmission mode to which the PDU corresponds to the physical layer. This disclosure facilitates the physical layer to transmit data in a corresponding transmission mode. The terminal equipment may determine the transmission mode or set the transmission mode according to the indication information, and layers of the terminal equipment perform corresponding processing.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of InternationalApplication PCT/CN2018/107410 filed on Sep. 25, 2018 and designated theU.S., the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

This disclosure relates to the field of communication technologies, andin particular to a method and apparatus for transmitting data of vehiclecommunication (V2X) services and a communication system.

BACKGROUND

Vehicle communication services are called V2X services. V2X services mayinclude multiple types, such as vehicle-to-vehicle (V2V) services,vehicle-to-infrastructure (V2I) services, and vehicle-to-pedestrian(V2P) services, etc.

V2X services may be provided via a PC5 interface and/or a Uu interface.V2X services transmitted via a PC5 interface may be provided by V2Xsidelink communication. The V2X sidelink communication is acommunication mode in which terminal equipments may directly communicatewith each other via a PC5 interface.

It should be noted that the above description of the background ismerely provided for clear and complete explanation of this disclosureand for easy understanding by those skilled in the art. And it shouldnot be understood that the above technical solution is known to thoseskilled in the art as it is described in the background of thisdisclosure.

SUMMARY

It was found by the inventors that in the long-term evolution (LTE), adata transmission mode of V2X sidelink communication is mainly broadcastin a physical layer (PHY); in the new radio (NR) technology, in order tosupport more application scenarios, V2X may use unicast or groupcasttransmission in the physical layer; in existing techniques, although aphysical (PHY) layer of a terminal equipment may be notified of atransmission mode in which data are transmitted, there is still a lackof in-depth research on how other layers of the terminal equipment needto work so that the physical layer may transmit data in an appropriatetransmission mode.

Embodiments of this disclosure provide a method and apparatus fortransmitting data and a communication system, in which a media accesscontrol layer of the terminal equipment generates at least one protocoldata unit (PDU) in a way that transmission modes to which service dataunits (SDU) contained in a PDU correspond are identical, hence, the PDUis able to correspond to the transmission mode, and a physical layer isfacilitated to transmit data in an appropriate transmission mode afterreceiving the PDU (i.e. a transport block).

According to a first aspect of the embodiments of this disclosure, thereis provided a communication apparatus, configured in a terminalequipment, the communication apparatus including: a first acquiring unitconfigured to acquire or select communication resources determined basedon a mapping between vehicle communication (V2X) services andcommunication resource parameters; and a communication unit configuredto transmit target V2X services by using the communication resources.

According to a second aspect of the embodiments of this disclosure,there is provided a communication apparatus, configured in a networkdevice, the communication apparatus including: a second acquiring unitconfigured to acquire or determine a mapping between vehiclecommunication (V2X) services and communication resource parameters.

According to a third aspect of the embodiments of this disclosure, thereis provided a communication system, including a terminal equipment and anetwork device, the terminal equipment including the communicationapparatus as described in the first aspect, and the network deviceincluding the communication apparatus as described in the second aspect.

An advantage of the embodiments of this disclosure exists in that amedia access stratum of the terminal equipment generates at least oneprotocol data unit (PDU) in a way that transmission modes to whichservice data units (SDU) contained in a PDU correspond are identical,hence, the PDU is able to correspond to the transmission mode, and aphysical layer is facilitated to transmit data in an appropriatetransmission mode.

With reference to the following description and drawings, the particularembodiments of this disclosure are disclosed in detail, and theprinciple of this disclosure and the manners of use are indicated. Itshould be understood that the scope of the embodiments of thisdisclosure is not limited thereto. The embodiments of this disclosurecontain many alternations, modifications and equivalents within thescope of the terms of the appended claims.

Features that are described and/or illustrated with respect to oneembodiment may be used in the same way or in a similar way in one ormore other embodiments and/or in combination with or instead of thefeatures of the other embodiments.

It should be emphasized that the term “comprise/include” when used inthis specification is taken to specify the presence of stated features,integers, steps or components but does not preclude the presence oraddition of one or more other features, integers, steps, components orgroups thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

Elements and features depicted in one drawing or embodiment of thedisclosure may be combined with elements and features depicted in one ormore additional drawings or embodiments. Moreover, in the drawings, likereference numerals designate corresponding parts throughout the severalviews and may be used to designate like or similar parts in more thanone embodiment.

The drawings are included to provide further understanding of thisdisclosure, which constitute a part of the specification and illustratethe preferred embodiments of this disclosure, and are used for settingforth the principles of this disclosure together with the description.It is obvious that the accompanying drawings in the followingdescription are some embodiments of this disclosure, and for those ofordinary skills in the art, other accompanying drawings may be obtainedaccording to these accompanying drawings without making an inventiveeffort. In the drawings:

FIG. 1 is a schematic diagram of a communication system of thisdisclosure;

FIG. 2 is a schematic diagram of the method for transmitting data ofvehicle communication (V2X) services of Embodiment 1 of this disclosure;

FIG. 3 is a schematic diagram of a part of compositions of the terminalequipment of this disclosure;

FIG. 4 is a schematic diagram of the data transmission method of oneimplementation of Embodiment 2 of this disclosure;

FIG. 5 is a schematic diagram of the data transmission method of anotherimplementation of Embodiment 2 of this disclosure;

FIG. 6 is a schematic diagram of the apparatus for transmitting data ofvehicle communication services of Embodiment 3 of this disclosure;

FIG. 7 is a schematic diagram of the apparatus for transmitting data ofvehicle communication (V2X) services of Embodiment 4 of this disclosure;

FIG. 8 is a schematic diagram of a structure of the terminal equipmentof Embodiment 5 of this disclosure; and

FIG. 9 is a schematic diagram of a structure of the network device ofEmbodiment 6 of this disclosure.

DETAILED DESCRIPTION

These and further aspects and features of this disclosure will beapparent with reference to the following description and attacheddrawings. In the description and drawings, particular embodiments of thedisclosure have been disclosed in detail as being indicative of some ofthe ways in which the principles of the disclosure may be employed, butit is understood that the disclosure is not limited correspondingly inscope. Rather, the disclosure includes all changes, modifications andequivalents coming within the terms of the appended claims. Variousembodiments of this disclosure shall be described below with referenceto the accompanying drawings. These embodiments are illustrative only,and are not intended to limit this disclosure.

In the embodiments of this disclosure, terms “first”, and “second”,etc., are used to differentiate different elements with respect tonames, and do not indicate spatial arrangement or temporal orders ofthese elements, and these elements should not be limited by these terms.Terms “and/or” include any one and all combinations of one or morerelevantly listed terms. Terms “contain”, “include” and “have” refer toexistence of stated features, elements, components, or assemblies, butdo not exclude existence or addition of one or more other features,elements, components, or assemblies.

In the embodiments of this disclosure, single forms “a”, and “the”,etc., include plural forms, and should be understood as “a kind of” or“a type of” in a broad sense, but should not defined as a meaning of“one”; and the term “the” should be understood as including both asingle form and a plural form, except specified otherwise. Furthermore,the term “according to” should be understood as “at least partiallyaccording to”, the term “based on” should be understood as “at leastpartially based on”, except specified otherwise.

In the embodiments of this disclosure, the term “communication network”or “wireless communication network” may refer to a network satisfyingany one of the following communication standards: long term evolution(LTE), long term evolution-advanced (LTE-A), wideband code divisionmultiple access (WCDMA), and high-speed packet access (HSPA), etc.

And communication between devices in a communication system may beperformed according to communication protocols at any stage, which may,for example, include but not limited to the following communicationprotocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G andnew radio (NR) in the future, etc., and/or other communication protocolsthat are currently known or will be developed in the future.

In the embodiments of this disclosure, the term “network device”, forexample, refers to an equipment in a communication system that accessesa terminal equipment to the communication network and provides servicesfor the terminal equipment. The network device may include but notlimited to the following equipment: a base station (BS), an access point(AP), a transmission reception point (TRP), a broadcast transmitter, amobile management entity (MME), a gateway, a server, a radio networkcontroller (RNC), a base station controller (BSC), etc.

The base station may include but not limited to a node B (NodeB or NB),an evolved node B (eNodeB or eNB), and a 5G base station (gNB), etc.Furthermore, it may include a remote radio head (RRH), a remote radiounit (RRU), a relay, or a low-power node (such as a femto, and a pico,etc.). The term “base station” may include some or all of its functions,and each base station may provide communication coverage for a specificgeographical area. And a term “cell” may refer to a base station and/orits coverage area, which may be expressed as a serving cell, and may bea macro cell or a pico cell, depending on a context of the term.

In the embodiments of this disclosure, the term “user equipment (UE)” or“terminal equipment (TE)” refers to, for example, equipment accessing toa communication network and receiving network services via a networkdevice, and may also be referred to as “terminal equipment (TE)”. Theterminal equipment may be fixed or mobile, and may also be referred toas a mobile station (MS), a terminal, a subscriber station (SS), anaccess terminal (AT), or a station, etc.

The terminal equipment may include but not limited to the followingdevices: a cellular phone, a personal digital assistant (PDA), awireless modem, a wireless communication device, a hand-held device, amachine-type communication device, a lap-top, a cordless telephone, asmart cell phone, a smart watch, and a digital camera, etc.

For another example, in a scenario of the Internet of Things (IoT),etc., the user equipment may also be a machine or a device performingmonitoring or measurement. For example, it may include but not limitedto a machine-type communication (MTC) terminal, a vehicle mountedcommunication terminal, a device to device (D2D) terminal, and a machineto machine (M2M) terminal, etc.

Scenarios in the embodiments of this disclosure shall be described belowby way of examples; however, this disclosure is not limited thereto.

FIG. 1 is a schematic diagram of a communication system of an embodimentof this disclosure, in which a case where terminal equipments and anetwork device are taken as examples is schematically shown. As shown inFIG. 1, a communication system 100 may include a network device 101 andmultiple terminal equipments 102, the multiple terminal equipments 102being, for example, a terminal equipment 1021, a terminal equipment1022, a terminal equipment 1023, and a terminal equipment 1024.

In the embodiment of this disclosure, existing traffics or traffics thatmay be implemented in the future may be performed between the networkdevice 101 and the terminal equipments 102. For example, such trafficsmay include but not limited to enhanced mobile broadband (eMBB), massivemachine type communication (MTC), and ultra-reliable and low-latencycommunication (URLLC), etc.

The terminal equipments 102 may transmit data to the network device 101and receive feedback information from the network device 101. Thenetwork device 101 may transmit data to one or more terminal equipments102, and receive feedback transmitted by the terminal equipments 102.

Furthermore, the terminal equipments 102 may transmit information on V2Xservices to other terminal equipments 102, or the terminal equipments102 may receive information on V2X services from other terminalequipments 102. For example, the terminal equipment 1021 transmitsinformation on V2X services to terminal equipment 1022, or the terminalequipment 1021 receives information on V2X services to terminalequipment 1022. For another example, the terminal equipment 1021transmits information on V2X services to terminal equipment 1022,terminal equipment 1023 and terminal equipment 1024.

Following description shall be given by taking a network device in acommunication system as a transmitter end and a terminal equipmenttherein as a receiver end as examples. However, this disclosure is notlimited thereto, and the transmitter end and the receiver end may alsobe other devices. For example, this disclosure is applicable not only tosignal transmission between two terminal equipments, but also to signaltransmission between a network device and a terminal equipment.

Embodiment 1

The embodiment of this disclosure provides a communication method, whichmay be carried out by a terminal equipment.

FIG. 2 is a schematic diagram of the method for transmitting data ofvehicle communication (V2X) services of this embodiment. As shown inFIG. 2, the method includes:

step 201: a media access control (MAC) layer of the terminal equipmentgenerates at least one protocol data unit (PDU) in a way thattransmission modes to which service data units (SDU) contained in a PDUcorrespond are identical; and

step 202: the MAC layer transmits the PDU to a physical layer of theterminal equipment, and notifies the transmission mode to which the PDUcorresponds to the physical layer.

According to this embodiment, the media access control layer of theterminal equipment generates at least one protocol data unit (PDU) in away that transmission modes to which service data units (SDU) containedin a PDU correspond are identical, hence, the PDU is able to correspondto the transmission mode, and a physical layer is facilitated totransmit data in an corresponding transmission mode.

For example, SDUs in a PDU corresponds to an identical transmissionmode, and the physical layer receives the PDU and is indicated atransmission mode to which the PDU corresponds. The physical layer isable to process the PDU to generate data to be transmitted. The data tobe transmitted corresponds to the transmission mode, that is, the datato be transmitted may be transmitted in this transmission mode. The PDUreceived by the physical layer is also referred to as a transport block(TB).

In this embodiment, the transmission mode includes broadcast, unicast,or groupcast.

For example, data transfer may be performed between a terminal equipmentand a roadside unit (RSU) or between two terminal equipments, and thedata may be transferred in a unicast mode; for another example, terminalequipments in close proximity may form a group, such as a platooning,and the terminal equipments may transmit data to group members in agroupcast mode.

In this embodiment, as shown in FIG. 2, the method may further include:

step 203: the terminal equipment determines or sets the transmissionmode.

Therefore, in step 201, the SDU contained in the PDU generated by themedia access control (MAC) layer of the terminal equipment maycorrespond to the transmission mode determined or set in step 203.

In step 203 of this embodiment, in one implementation, an upper layer ofthe terminal equipment determines the transmission mode; or, in anotherimplementation, an access stratum (AS) layer of the terminal equipmentdetermines the transmission mode; or, in a further implementation, theterminal equipment may set the transmission mode according to theindication information used for configuring or indicating thetransmission mode.

Hereinafter, each of the above implementations in step 203 shall bedescribed respectively.

Implementation 1: determining the transmission mode by the upper layerof the terminal equipment.

In this embodiment, the upper layer of the terminal equipment refers toa V2X application layer or a non-access stratum (NAS) layer.

In Implementation 1, the upper layer of the terminal equipment maydetermine the transmission mode by using two methods. Method 1: theupper layer of the terminal equipment indicates data packets of the V2Xservices and a transmission mode to which the data packets of the V2Xservices correspond; and method 2: a packet filter of a non-accessstratum (NAS) layer of the terminal equipment determines a transmissionmode to which data in quality of service flows correspond.

FIG. 3 is a schematic diagram of a part of compositions of the terminalequipment, 301 and 302 are optional. How corresponding parts of theterminal equipment work in Implementation 1 shall be described belowwith reference to FIG. 3.

In method 1, the upper layer of the terminal equipment indicates thedata packets of the V2X services and the transmission mode to which thedata packet(s) of the V2X services correspond. The transmission mode maybe indicated to the packet filter unit, and/or a service data adaptationprotocol (SDAP) layer, and/or a packet data convergence protocol (PDCP)layer. When the transmission mode is indicated to the packet filter, thepacket filter of the terminal equipment may map the data packets to thequality of service (QoS) flows according to the indicated transmissionmode. Transmission modes to which data packets in a quality of serviceflow correspond are identical.

A situation where the transmission mode is indicated to the packetfilter shall be explained first. The corresponding parts of the terminalequipment work as follows:

step 1.1: as shown in FIG. 3, the packet filter 301 of the terminalequipment may map the data packets to the quality of service (QoS) flowsaccording to the data packets and transmission mode indicated by theupper layer. Transmission modes to which data packets in a QoS flow areidentical; hence, there exists a correspondence between the quality ofservice flows and transmission modes; furthermore, the packet filter 301may mark the transmission mode of the quality of service flows;

step 1.2: the service data adaptation protocol (SDAP) layer 302 of theterminal equipment may map the QoS flows to data radio bearers (DRBs),and a result of mapping may be: transmission modes to which quality ofservice flows on a DRB correspond are identical; hence, the DRBscorrespond to the transmission modes;

step 1.3: the packet data convergence protocol (PDCP) layer 303 of theterminal equipment may map the QoS flows onto the data radio bearers(DRBs); transmission modes to which quality of service flows on a DRBcorrespond are identical; hence, the DRBs correspond to the transmissionmodes; it should be noted that as the SDAP layer 302 is optional, step1.2 is also optional; in a case of existence of step 1.2, the SDAP layer302 maps the QoS flows onto the DRBs, hence, step 1.3 may not exist; ina case of no step 1.2, step 1.3 may exist, and the PDCP layer 303 mapsthe QoS flows onto the DRBs;

step 1.4: the data in the data radio bearers (DRBs) are transmitted to aradio link control (RLC) layer 304 via a corresponding radio linkcontrol (RLC) channel, and transmitted to a media access control (MAC)layer 305 via a corresponding logical channel (LCH); an SDU of the MAClayer 305 comes from the logical channel (LCH); in this procedure, thedata radio bearers (DRBs) correspond to the logical channel (LCH),hence, the logical channel (LCH) corresponds to the transmission mode,and the SDU from the MAC layer 305 of the logical channel also forms acorrespondence with the transmission mode;

step 1.5: the MAC layer 305 may assemble the PDU according to thetransmission mode to which the SDU corresponds, so that transmissionmodes to which the SDU included in the PDU corresponds are allidentical, as shown in step 201 in FIG. 2; and furthermore, the MAClayer 305 may transmit the PDU (i.e. a transport block) to the physicallayer 306, and notify the physical layer 306 of the transmission mode towhich the PDU (i.e. the transport block) corresponds.

Following are particular examples regarding steps 1.1 to 1.5.

For example, the upper layer of the terminal equipment indicates thatdata packets 1/2/3/4 of the V2X services are transmitted in a unicastmode, and data packets 5/6 are transmitted in a groupcast mode. In thepacket filter 301, the data packets 1/2 may be mapped to a QoS flow1(corresponding to the unicast transmission mode), the data packet 3 maybe mapped to a QoS flow2 (corresponding to the unicast transmissionmode), the data packet 4 may be mapped to a QoS flow3 (corresponding tothe unicast transmission mode), and the data packets 5/6 may be mappedto a QoS flow4 (corresponding to the groupcast transmission mode). Atthe SDAP layer 302 of the terminal equipment, the QoS flows 1/2 may bemapped to the data radio bearer DRB1 (corresponding to the unicasttransmission mode), QoS flow3 may be mapped to DRB2 (corresponding tothe unicast transmission mode), and the QoS flow 4 may be mapped to DRB3(corresponding to the groupcast transmission mode). In this way, thetransmission modes to which logical channels corresponds are unicast,unicast and groupcast, respectively, DRB1, DRB2 and DRB3 correspondingto the logical channels. The MAC layer 305 performs logical channelpriority processing, and generated MAC PDUs include data of the logicalchannels to which DRB1 and DRB2 correspond, that is, the MAC SDUs arefrom the logical channels to which DRB1 and DRB2 correspond(corresponding to the unicast transmission mode), in which case atransmission mode to which the MAC SDUs correspond is unicast; orgenerated MAC PDUs include data of the logical channel to which DRB3corresponds, that is, the MAC SDUs are from the logical channel to whichDRB3 corresponds (corresponding to the groupcast transmission mode), inwhich case a transmission mode to which the MAC SDUs correspond isgroupcast. The MAC layer 305 notifies the physical layer 306 of thetransmission mode to which the MAC PDUs correspond, and transmits theMAC PDUs to the physical layer 306 for subsequent processing by thephysical layer 306. For example, the physical layer 306 processes theMAC PDUs to generate data to be transmitted. The data to be transmittedcorrespond to the transmission mode, that is, the data to be transmittedmay be transmitted in the transmission mode.

The case where the transmission mode is indicated to the packet filterin method 1 of Implementation 1 is described above.

In a case where the transmission mode is indicated to the SDAP layer302, the service data adaptation protocol (SDAP) layer maps the qualityof service flows or the Data packets of the V2X services to the dataradio bearers (DRBs) according to the indicated transmission mode, andtransmission modes to which the quality of service flows or the Datapackets of the V2X services on a DRB correspond are identical. Inaddition, reference may be made to step 1.3, step 1.4 and step 1.5 forprocessing of the PDCP layer 303, the RLC layer 304 and the MAC layer305.

In a case where the transmission mode is indicated to the packet dataconvergence protocol (PDCP) layer 303 of the terminal equipment, thequality of service flows or the Data packets of the V2X services aremapped to the data radio bearers (DRBs) according to the indicatedtransmission mode, the transmission modes to which the quality ofservice flows or Data packets of the V2X services on a DRB correspondare identical. In addition, reference may be made to step 1.4 and step1.5 for processing of the RLC layer 304 and the MAC layer 305.

In method 2 of Implementation 1, the packet filter 301 of the non-accessstratum (NAS) layer of the terminal equipment determines thetransmission mode to which the data in the quality of service flows.

For example, the packet filter of the terminal equipment maps the Datapackets of the V2X services to the quality of service flows (QoS flows),the transmission modes to which the data packets in a quality of serviceflow correspond are identical, and the packet filter unit determines atransmission mode to which a quality of service flow corresponds. Inaddition, the packet filter may notify the SDAP of the transmissionmode. In addition, reference may be made to step 1.2, step 1.3, step 1.4and step 1.5 for processing of the SDAP layer 302, the PDCP layer 303,the RLC layer 304 and the MAC layer 305.

Implementation 2: determining the transmission mode by the accessstratum of the terminal equipment.

In this embodiment, the access stratum (AS) layer of the terminalequipment may include the SDAP layer 302, the PDCP layer 303, the RLClayer 304, and the MAC layer 305. In Implementation 2, the transmissionmode may be determined by the SDAP layer 302, the PDCP layer 303, theRLC layer 304, or the MAC layer 305.

A case where the SDAP layer 302 determines the transmission mode: theservice data adaptation protocol (SDAP) layer may determine atransmission mode to which the QoS flows or Data packets of the V2Xservices correspond, and map the QoS flows or the Data packets of theV2X services to the data radio bearers (DRBs), where transmission modesto which the QoS flows or the Data packets of the V2X services on a DRBare identical; or, the service data adaptation protocol (SDAP) layermaps the QoS flows or the Data packets of the V2X services onto the dataradio bearers (DRBs), and determines a transmission mode to which theDRBs correspond.

For example, the Data packets of the V2X services are mapped to the QoSflows by the packet filter 301. The SDAP layer 302 determines atransmission mode to which the QoS flows correspond, and maps the QoSflows to the DRBs, so that transmission modes to which QoS flowscorrespond are identical, a DRB corresponding the QoS flows; or, theSDAP layer 302 maps the QoS flows to the DRBs, and the SDAP layerdetermines a transmission mode to the DRBs correspond. In addition,reference may be made to step 1.3, step 1.4 and step 1.5 for processingof the PDCP layer 303, the RLC layer 304 and the MAC layer 305.

A case where the PDCP layer 303 determines the transmission mode: thepacket data convergence protocol (PDCP) layer determines a transmissionmode to which the DRBs correspond, or a transmission mode to which aradio link control channel (RLC) corresponds, or a transmission mode towhich a logical channel corresponds, the DRBs corresponding to the radiolink control channel (RLC) and the logical channel.

For example, the Data packets of the V2X services are mapped to the QoSflows by the packet filter 301, the SDAP layer 302 maps the QoS flows tothe DRBs, and the PDCP layer 303 determines the transmission mode towhich the DRBs correspond or the transmission mode to which the radiolink control channel (RLC) corresponds or the transmission mode to whichthe logical channel corresponds, the DRBs corresponding to the radiolink control channel (RLC) and the logical channel. In addition,reference may be made to step 1.4 and step 1.5 for processing of the RLClayer 304 and the MAC layer 305.

A case where the RLC layer 304 determines the transmission mode: theradio link control (RLC) layer 304 determines a transmission mode towhich a radio link control (RLC) channel corresponds or a transmissionmode to which a logical channel corresponds.

For example, the Data packets of the V2X services are mapped to the QoSflows by the packet filter 301, and the SDAP layer 302 maps the QoSflows to the DRBs. The RLC layer 304 determines the transmission mode towhich the RLC channel corresponds or the transmission mode to which thelogical channel corresponds, the DRBs corresponding to the radio linkcontrol channel (RLC) and the logical channel. In addition, referencemay be made to step 1.5 for processing of the MAC layer 305.

A case where the transmission mode is determined by the MAC layer 305:the media access control (MAC) layer 305 determines a transmission modeto which a logical channel corresponds or a transmission mode to whichan MAC PDU corresponds.

For example, the Data packets of the V2X services are mapped to the QoSflows by the packet filter 301, and the SDAP layer 302 maps the QoSflows to the DRBs. Data of a logical channel to which the DRBscorrespond are transmitted to the MAC layer as MAC SDUs, and the MAC issubjected to a logical channel priority processing procedure to generateMAC PDUs including the MAC SDUs. The MAC layer 305 determines thetransmission mode to which the logical channel corresponds or thetransmission mode to which the MAC PDUs correspond. In addition, the MAClayer 305 may notify the physical layer 306 of the MAC PDUs and atransmission mode corresponding thereto.

In Implementation 1 and Implementation 2 of this embodiment, theterminal equipment determines the transmission mode, and each layer ofthe terminal equipment may learn the transmission mode in at least onemethod.

In an example, the method for learning the transmission mode may be: ahigher layer of the terminal equipment notifies the transmission mode toa lower layer of the terminal equipment. For example, the SDAP layernotifies the PDCP layer of the transmission mode to which the DRBscorrespond, and/or the PDCP layer notifies the RLC layer of thetransmission mode to which the RLC channel corresponds, and/or the RLCnotifies the MAC of the transmission mode of the logical channel. Inaddition, notification may be performed across layers; for example, thePDCP layer directly notifies the MAC layer of the transmission mode ofthe logical channel.

In another example, the method for learning the transmission mode maybe: the terminal equipment marks the transmission modes to which thedata packets of the V2X services, and/or the QoS flows, and/or the dataradio bearers (DRBs), and/or the radio link control (RLC) channels,and/or the logical channels correspond, such as marking the transmissionmodes of the data packets of the V2X service and/or the quality ofservice flows and/or the data radio bearers, and reading theflows/DRBs/RLC/logical channel at each layer.

In Implementation 1 and Implementation 2 of this embodiment, theterminal equipment determines the transmission mode. Therefore, theterminal equipment may notify the network device of the transmissionmode, so that the network device allocates appropriate sidelinkresources for transmitting data, such as when the terminal equipment iswithin network coverage, the network device is facilitated to allocateappropriate sidelink resources for transmitting data.

The terminal equipment may notify the network device of the transmissionmode via a sidelink UE information radio resource control (RRC) message,or a sidelink buffer status report (BSR), or a scheduling request (SR).

For example, in a case where the terminal equipment notifies the networkdevice of the transmission mode via the sidelink UE information RRCmessage, the RRC message includes a transmission mode to which V2Xservices, and/or QoS flows, and/or a DRB, and/or a logical channel, ofthe UE, correspond;

in a case where the terminal equipment notifies the network device ofthe transmission mode via the BSR, the BSR includes a transmission modeto which a logical channel and/or a logical channel group corresponds;

and in a case where the terminal equipment notifies the network deviceof the transmission mode via the SR, the SR includes a transmission modeto which a logical channel corresponds, the SR corresponding to thelogical channel, or the SR includes a logical channel identifier and atransmission mode to which the logical channel corresponds.

Correspondingly, when the network device receives a notification of thetransmission mode from the terminal equipment, it may allocate asidelink resource pool and/or a sidelink grant suitable for thetransmission mode for the UE.

Implementation 3: the terminal equipment sets the transmission modeaccording to an indication information used for configuring orindicating the transmission mode.

In Implementation 3, the indication information may be provided by thenetwork device, which may be a network device of a core network or anetwork device of an access network; the indication information may alsobe pre-configured to the terminal equipment; and furthermore, theindication information may be provided by the roadside unit (RSU) forthe terminal equipment.

In Implementation 3, in a case where the indication information isprovided by the network device of the core network, the terminalequipment may receive the indication information via dedicated RRCsignaling or system information.

The indication information provided by the network device of the corenetwork may be used to configure a transmission mode to which datapackets and/or QoS flows on the sidelink correspond.

The indication information includes configuration of transmission modesof each data packets of V2X services on one or more sidelinks (such asindicating transmission modes for V2X service types), or includesconfiguration of transmission modes of one or more QoS flows (theconfiguration including a QoS flow ID and a transmission mode to whichit corresponds).

For example, when the terminal equipment is within coverage of thenetwork device of the core network, after receiving the indicationinformation, the terminal equipment may configure the transmission modeto which the data packets and/or QoS flows on the sidelink correspondaccording to the indication information. After the transmission mode isset, reference may be made to the description of Implementation 1 forbehaviors of each layer of the terminal equipment.

In Implementation 3, in a case where the indication information isprovided by the network device of the access network, the terminalequipment may receive the indication information via dedicated RRCsignaling or system information or MAC control signaling or physicallayer control signaling.

In a case where the terminal equipment receives the indicationinformation via the dedicated RRC signaling or system information, theindication information may be used for configuring the transmission modeto which the DRBs, and/or the RLC channel, and/or the logical channel onthe side link correspond. The indication information includes a DRBidentifier (ID) and/or an RLC channel identifier and/or a logicalchannel identifier on the sidelink and transmission modes correspondingthereto.

For example, when the terminal equipment is within the coverage of thenetwork device of the access network, after receiving the indicationinformation, the terminal equipment may configure the transmission modesof the DRBs, and/or the RLC channel, and/or the logical channel on thesidelink according to the indication information. After the transmissionmode is set, reference may be made to the description of Implementation2 for behaviors of each layer of the terminal equipment.

In a case where the terminal equipment receives the indicationinformation via the MAC control signaling, the indication informationmay be used for configuring the transmission mode to which a logicalchannel or a logical channel group on the sidelink corresponds. Theindication information includes a logical channel identifier or alogical channel group identifier on the sidelink and a transmission modecorresponding thereto, or the indication information includes a bitmapfile for indicating transmission modes of which logical channels orlogical channel groups are included in the MAC CE, and transmissionmodes to which the included logical channels or logical channel groupscorrespond, to the terminal equipment.

In a case where the terminal equipment receives the indicationinformation via the physical layer control signaling, the indicationinformation may also include the transmission mode to which thescheduled sidelink data correspond, such a transmission mode to which ascheduled sidelink MAC PDU (i.e., a transport block) corresponds.

For example, the indication information may be included in downlinkcontrol information (DCI), such as a sidelink grant, and the indicationinformation may indicate a transmission mode to which sidelink datascheduled this time or N (N is a positive integer) times correspond,such as a transmission mode to which a sidelink MAC PDU (i.e., atransport block) scheduled this time or N times corresponds, and theterminal equipment may set that a transmission mode to which sidelinkdata to be transmitted this time or N times correspond is broadcast,groupcast or unicast according to the indication information, such assetting a transmission mode to which a sidelink MAC PDU (i.e., atransport block) to be transmitted this time or N times as broadcast,groupcast or unicast. N times mean this time and next few times.

In Implementation 3, the pre-configured indication information may beused for configuring a transmission mode to which data packets, and/orQoS flows, and/or DRBs, and/or an RLC channel, and/or a logical channelon the sidelink corresponds.

For example, the terminal equipment configures the transmission mode ofthe DRBs, and/or the RLC channel, and/or the logical channel on thesidelink according to the pre-configured indication information. Afterthe transmission mode is set, reference may be made to the descriptionof Implementation 1 and Implementation 2 for behaviors of each layer ofthe terminal equipment.

In step 203 of this embodiment, according to Implementation 1 andImplementation 2, the upper layer or access stratum of the terminalequipment determines the transmission mode. A basis for determining thetransmission method in Implementation 1 and Implementation 2 by theterminal equipment shall be described below.

In this embodiment, the upper layer or access stratum of the terminalequipment may determine the transmission mode to which to-be-transmitteddata correspond based on QoS characteristics and/or QoS grade indicationof the data, and/or a target terminal equipment to which the data aretransmitted, and/or contents of information contained in the data,and/or a geographical location of the terminal equipment.

In this embodiment, the QoS characteristics include: priorities of thedata, and/or latency of the data, and/or reliabilities of the data,and/or data rates of the data, and/or a communication range of the data.

For example, a transmission mode of high-priority data with a priorityhigher than a first threshold may be unicast or groupcast, and atransmission mode of low-priority data with a priority lower than asecond threshold may be broadcast; a transmission mode ofhigh-latency-requirement data with a latency requirement higher than athird threshold may be unicast or groupcast, and a transmission mode ofloose-latency-requirement data with a latency requirement lower than afourth threshold may be broadcast; a transmission mode ofhigh-reliability-requirement data with a reliability requirement higherthan a fifth threshold may be unicast or groupcast, and a transmissionmode of low-reliability-requirement data with a reliability requirementlower than a sixth threshold may be broadcast; a transmission mode ofhigh-data-rate data with a data rate higher than a seventh threshold maybe broadcast, and a transmission mode of low-data-rate data with a datarate lower than an eighth threshold may be unicast; a transmission modeof small-communication-range data with a communication range smallerthan a ninth threshold may be unicast, and a transmission mode oflarge-communication-range data with a communication range larger than atenth threshold may be groupcast or broadcast, and so on.

In this embodiment, there may exist a mapping between the QoS gradeindication of the data and the transmission mode, hence, thetransmission mode may be determined based on the QoS grade indication.The QoS grade indication of the data may correspond to values of morethan two QoS characteristics. For example, when the QoS grade indicationis of a certain grade, the grade indication corresponds to respectivefirst values of multiple QoS characteristics, and when the QoS gradeindication is of another grade, the grade indication corresponds torespective second values of the multiple QoS characteristics. A QoSfeature includes: priorities of the data, or latency of the data, orreliabilities of the data, or data rates of the data, or a communicationrange of the data.

In this embodiment, the transmission mode of the data is determinedbased on the destination terminal equipment to which the data to betransmitted are transmitted. For example: in a group, data transmittedby the terminal equipment as a group member to other terminal equipmentsas other group members may be transmitted in the groupcast mode, datatransmitted to a specific terminal equipment as a group member or aterminal equipment as a group head may be transmitted in the unicastmode, and data transmitted to terminal equipments in and outside a groupmay be transmitted in the broadcast mode.

In this embodiment, the contents of information contained in the datainclude: a road condition, and/or environment, and/or information on anevent, or include: a service request, and/or feedback, or group commoninformation. Determining the transmission mode of the data based on thecontents of the information contained in the data may be, for example,the transmission mode of the data including such information as a roadcondition, environment, an accident, etc., may be broadcast; thetransmission mode of the data including a service request, feedback,etc., may be unicast, and the transmission mode of the data includinggroup common information may be groupcast; the group common informationmay be, for example, group security information and/or fleet(platooning) notification information, etc.

In this embodiment, determining the transmission mode to which the datacorrespond based on the geographical location of the terminal equipmentmay be, for example, the transmission mode of the data may be groupcastwhen the geographical location of the terminal equipment is in area A,and the transmission mode of the data may be unicast when thegeographical location of the terminal equipment is in area B, etc.

In this embodiment, suitable transmission modes of unicast, orgroupcast, or broadcast may be used according to the characteristics ofthe data to be transmitted, which is conducive to data transmissionsatisfying their QoS or being transmitted to a specific destination,while ensuring high radio resource utilization.

In addition, in step 203 of this embodiment, in Implementation 3 wherethe terminal equipment sets the transmission mode according to theindication information, the transmission mode indicated by theindication information may also be determined based on the above basis.For example, the network device of the core network, the network deviceof the access network, or the roadside unit determines the transmissionmode to which the data to be transmitted correspond based on the QoScharacteristics of the data to be transmitted, and/or the QoS gradeindication, and/or the destination terminal equipment to which the dataare to be transmitted, and/or the contents of the information containedin the data, and/or the geographical location of the terminal equipment,and the transmission mode is indicated to the terminal equipment via theindication information; or, in the indication information pre-configuredto the terminal equipment, the transmission mode to which the data to betransmitted correspond is also determined based on the QoScharacteristics of the data to be transmitted, and/or the QoS gradeindication, and/or the destination terminal equipment to which the dataare to be transmitted, and/or the contents of the information containedin the data, and/or the geographical location of the terminal equipment.

According to this embodiment, the media access control layer of theterminal equipment generates at least one PDU in a mode identical to atransmission mode to which a service data unit (SDU) contained in aprotocol data unit (PDU) corresponds, hence, the PDU is able tocorrespond to the transmission mode, and a physical layer is facilitatedto transmit data in an appropriate transmission mode. And furthermore,in this embodiment, the terminal equipment determines or sets thetransmission mode according to the indication information, and thelayers of the terminal equipment perform corresponding processing, whichare simple in implementation.

Embodiment 2

Embodiment 2 provides a data transmission method, which is carried outby a network device.

FIG. 4 is a schematic diagram of the data transmission method of oneimplementation of Embodiment 2 of this disclosure. The implementation ofEmbodiment 2 corresponds to Implementation 3 in step 203 ofEmbodiment 1. As shown in FIG. 4, the method includes:

step 401: the network device generates indication information used forconfiguring or indicating transmission modes for transmitting data of aterminal equipment; and

step 402: the network device transmits the indication information to theterminal equipment.

In this embodiment, the transmission modes include unicast, groupcast,or broadcast.

In this embodiment, the network device may be a network device of a corenetwork, or a network device of an access network.

In this embodiment, when the network device is a network device of acore network, the indication information transmitted by the networkdevice is used for configuring transmission modes to which data packetsand/or QoS flows on a sidelink correspond.

In this embodiment, when the network device is a network device of anaccess network, the indication information transmitted by the networkdevice of the access network is used for configuring transmission modesof DRBs on a sidelink of the terminal equipment and/or RLC channelsand/or logical channels.

In this embodiment, when the network device is a network device of anaccess network, the indication information transmitted by the networkdevice of the access network may contain transmission modes to whichscheduled sidelink data correspond.

In this embodiment, the network device configures or indicates thetransmission mode of the data of the terminal equipment in performingvehicle communication services, and the terminal equipment may set atransmission mode according to the indication information, and transmitthe data of the vehicle communication services in the set transmissionmode.

FIG. 5 is a schematic diagram of the data transmission method of anotherimplementation of Embodiment 2 of this disclosure, and thisimplementation corresponds to Implementation 1 and Implementation 2 ofstep 203 of Embodiment 1. As shown in FIG. 5, the method includes:

step 501: the network device receives a notification of a transmissionmode of data of a terminal equipment transmitted by the terminalequipment.

In step 501, the network device may receive the notification via asidelink UE information radio resource control (RRC) message, or asidelink buffer status report (BSR), or a scheduling request (SR).

In this embodiment, in the indication information described in theimplementation in FIG. 4 or the received notification described in theimplementation in FIG. 5, the transmission mode may be determined basedon QoS characteristics and/or QoS grade indication of to-be-transmitteddata, and/or a target terminal equipment to which the data aretransmitted, and/or contents of information contained in the data,and/or a geographical location of the terminal equipment.

The QoS characteristics include: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data; and the contents ofinformation contained in the data include: a road condition, and/orenvironment, and/or information on an event, or include: a servicerequest, and/or feedback, or group common information.

Furthermore, step 501 may be combined with FIG. 4, that is, the methodin FIG. 4 may include step 401, step 402 and step 501.

According to this embodiment, the physical layer is facilitated totransmit data in an appropriate transmission mode. And furthermore,suitable transmission modes of unicast, or groupcast, or broadcast maybe used according to the characteristics of the data to be transmitted,which is conducive to data transmission satisfying their QoS or beingtransmitted to a specific destination, while ensuring high radioresource utilization.

Embodiment 3

Embodiment 3 of this disclosure provides an apparatus for transmittingdata of vehicle communication services, provided in a terminalequipment. As a principle of the apparatus for solving problems issimilar to that of the method in Embodiment 1, reference may be made tothe implementation of the method in Embodiment 1 for implementation ofthis apparatus, with identical contents being going to be describedherein any further.

FIG. 6 is a schematic diagram of the apparatus for transmitting data ofvehicle communication services of Embodiment 3 of this disclosure. Asshown in FIG. 6, an apparatus 600 for transmitting data of vehiclecommunication services includes:

a first generating unit 601 configured in a media access control (MAC)layer of the terminal equipment and configured to generate at least oneprotocol data unit (PDU) in a way that transmission modes to whichservice data units (SDU) contained in a PDU correspond are identical;and

a first transmitting unit 602 configured in the MAC layer and configuredto transmit the PDU to a physical layer of the terminal equipment, andnotify the transmission mode to which the PDU corresponds to thephysical layer.

In this embodiment, the transmission mode includes unicast, orgroupcast, or broadcast.

As shown in FIG. 6, the apparatus 600 further includes:

a first determining unit 603 configured in an upper layer of theterminal equipment and configured to determine the transmission mode.

In Implementation 1, the first determining unit 603 indicates datapackets of the V2X services and a transmission mode to which the datapackets of the V2X services correspond.

In Implementation 1, as shown in FIG. 6, the apparatus 600 furtherincludes:

a first mapping unit 604 configured in a packet filter of the terminalequipment and configured to map the data packets onto quality of service(QoS) flows; and transmission modes to which data packets in a QoS flowcorrespond are identical.

In Implementation 1, as shown in FIG. 6, the apparatus 600 furtherincludes:

a second mapping unit 605 configured in a service data adaptationprotocol (SDAP) layer of the terminal equipment and configured to mapthe QoS flows or the data packets of the V2X services onto data radiobearers (DRBs); transmission modes to which QoS flows or data packets ofthe V2X services on a DRB correspond are identical.

In Implementation 1, as shown in FIG. 6, the apparatus 600 furtherincludes:

a third mapping unit 606 configured in a packet data convergenceprotocol (PDCP) layer of the terminal equipment and configured to mapthe QoS flows or the data packets of the V2X services onto data radiobearers (DRBs); transmission modes to which QoS flows or data packets ofthe V2X services on a DRB correspond are identical.

In Implementation 1, the first determining unit 603 is configured in thepacket filter. The packet filter maps the data packets onto the qualityof service (QoS) flows; and transmission modes to which data packets ina QoS flow correspond are identical, and a transmission mode to whichthe QoS flows correspond is determined by the first determining unit.

In Implementation 2, as shown in FIG. 6, the apparatus 600 furtherincludes:

a second determining unit 607 configured in an access stratum of theterminal equipment and configured to determine the transmission mode.

The second determining unit 607 is configured in the service dataadaptation protocol (SDAP) layer, or the packet data convergenceprotocol (PDCP) layer, or a radio link control (RLC) layer, or the mediaaccess control (MAC) layer, of the terminal equipment, and configured todetermine the transmission mode.

The second determining unit 607 is configured in the service dataadaptation protocol (SDAP) layer, and the second determining unitdetermines the transmission modes to which the QoS flows or data packetsof the V2X services correspond, and the service data adaptation protocol(SDAP) layer maps the QoS flows or data packets of the V2X services ontodata radio bearers (DRBs); wherein transmission modes to which QoS flowsor data packets of the V2X services on a DRB correspond are identical;or the service data adaptation protocol (SDAP) layer maps the QoS flowsor data packets of the V2X services onto data radio bearers (DRBs), andthe second determining unit determines transmission modes to which theDRBs correspond.

For another example, the second determining unit 607 is configured inthe packet data convergence protocol (PDCP) layer and configured todetermine the transmission modes to which the DRBs correspond, ortransmission modes to which radio link control (RLC) channelscorrespond, or transmission modes to which logical channels correspond,the DRBs corresponding to the RLC channels and the logical channels.

For a further example, the second determining unit 607 is configured inthe radio link control (RLC) layer and is configured to determinetransmission modes to which radio link control (RLC) channels correspondor transmission modes to which logical channels correspond.

For yet another example, the second determining unit 607 is configuredin the media access control (MAC) layer and is configured to determinethe transmission modes to which the logical channels correspond or thetransmission mode to which the PDU corresponds.

In Implementation 1 and Implementation 2, as shown in FIG. 6, theapparatus 600 further includes:

a second transmitting unit 608 configured in a higher layer of theterminal equipment and configured to notify the transmission modes to alower layer; or a marking unit 609 configured to mark the transmissionmodes to which the data packets of the V2X services, and/or the QoSflows, and/or the data radio bearers (DRBs), and/or the radio linkcontrol (RLC) channels, and/or the logical channels correspond.

In Implementation 1 and Implementation 2, as shown in FIG. 6, theapparatus 600 further includes:

a first notifying unit 610 configured to notify the transmission modesto a network device.

The first notifying unit 610 notifies the transmission modes to thenetwork device via a sidelink UE information radio resource control(RRC) message, or a sidelink buffer status report (BSR), or a schedulingrequest (SR).

In Implementation 3, as shown in FIG. 6, the apparatus 600 furtherincludes:

a first setting unit 611 configured to set the transmission modesaccording to indication information used for configuring or indicatingthe transmission modes; wherein the indication information is providedby a network device of a core network, or a network device of an accessnetwork, or is provided by a roadside unit (RSU), or is preconfigured.

The indication information provided by the network device of the corenetwork is used to configure transmission modes to which data packets ona sidelink and/or the QoS flows correspond; the indication informationprovided by the network device of the access network is used toconfigure the transmission modes to which the DRBs on the sidelinkand/or the RLC channels and/or the logical channels correspond; and theindication information provided by the network device of the accessnetwork contains transmission modes to which scheduled sidelink datacorrespond.

In Implementation 3, the pre-configured indication information is usedto configure transmission modes to which data packets on a sidelinkand/or the QoS flows and/or the DRBs and/or the RLC channels and/or thelogical channels correspond.

In this embodiment, the transmission modes are determined based on QoScharacteristics and/or QoS grade indication of to-be-transmitted data,and/or a target terminal equipment to which the data are transmitted,and/or contents of information contained in the data, and/or ageographical location of the terminal equipment.

The QoS characteristics include: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data; and the contents ofinformation contained in the data include: a road condition, and/orenvironment, and/or information on an event, or include: a servicerequest, and/or feedback, or group common information.

Reference may be made to the description of corresponding steps inEmbodiment 1 for details of the units, which shall not be describedherein any further.

According to this embodiment, the media access control layer of theterminal equipment generates at least one PDU in a way that transmissionmodes to which service data units (SDU) contained in a protocol dataunit (PDU) correspond are identical, hence, the PDU is able tocorrespond to the transmission mode, and a physical layer is facilitatedto transmit data in a corresponding transmission mode. And furthermore,in this embodiment, the terminal equipment determines or sets thetransmission mode according to the indication information, and thelayers of the terminal equipment perform corresponding processing, whichare simple in implementation.

Embodiment 4

Embodiment 4 provides an apparatus for transmitting data of vehiclecommunication (V2X) services, provided in a network device. As aprinciple of the apparatus for solving problems is similar to that ofthe method in Embodiment 2, reference may be made to the implementationof the method in Embodiment 2 for implementation of this apparatus, withidentical contents being going to be described herein any further.

FIG. 7 is a schematic diagram of the apparatus for transmitting data ofvehicle communication (V2X) services of Embodiment 4 of this disclosure.As shown in FIG. 7, an apparatus 700 for transmitting data of vehiclecommunication services includes:

a second generating unit 701 configured to generate indicationinformation used for configuring or indicating transmission modes fortransmitting data of a terminal equipment; and

a third transmitting unit 702 configured to transmit the indicationinformation to the terminal equipment.

In this embodiment, the network device is a network device of a corenetwork, or a network device of an access network.

In this embodiment, when the network device is a network device of acore network, the indication information is used for configuringtransmission modes of which data packets and/or QoS flows on a sidelink.

In this embodiment, when the network device is a network device of anaccess network, the indication information is used for configuringtransmission modes of DRBs on a sidelink and/or RLC channels and/orlogical channels.

As shown in FIG. 7, the apparatus 700 may further include:

a first receiving unit 703 configured to receive a notification of atransmission mode of data of a terminal equipment transmitted by theterminal equipment.

In this embodiment, the first receiving unit receives the notificationvia a sidelink UE information radio resource control (RRC) message, or asidelink buffer status report (BSR), or a scheduling request (SR).

In this embodiment, in the indication information generated by thesecond generating unit or in the notification received by the firstreceiving unit:

the transmission mode may be determined based on QoS characteristicsand/or QoS grade indication of to-be-transmitted data, and/or a targetterminal equipment to which the data are transmitted, and/or contents ofinformation contained in the data, and/or a geographical location of theterminal equipment.

The QoS characteristics include: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data.

The contents of information contained in the data include: a roadcondition, and/or environment, and/or information on an event, orinclude: a service request, and/or feedback, or group commoninformation.

Furthermore, it should be noted that the apparatus 700 in thisembodiment may only include the first receiving unit 703.

Reference may be made to the description of corresponding steps inEmbodiment 2 for details of the units, which shall not be describedherein any further.

According to this embodiment, the physical layer is facilitated totransmit data in a corresponding transmission mode. And furthermore,suitable transmission modes of unicast, or groupcast, or broadcast maybe used according to the characteristics of the data to be transmitted,which is conducive to data transmission satisfying their QoS or beingtransmitted to a specific destination, while ensuring high radioresource utilization.

Embodiment 5

Embodiment 5 of this disclosure provides a terminal equipment. As aprinciple of the terminal equipment for solving problems is similar tothat of the method in Embodiment 1, reference may be made to theimplementation of the method in Embodiment 1 for implementation of thisterminal equipment, with identical contents being going to be describedherein any further.

FIG. 8 is a schematic diagram of a structure of the terminal equipmentof the embodiment of this disclosure. As shown in FIG. 8, a terminalequipment 800 may include a central processing unit (CPU) 801 and amemory 802, the memory 802 being coupled to the central processing unit801. The memory 802 may store various data, and furthermore, it maystore a program for data processing, and execute the program undercontrol of the central processing unit 801, so as to indicate to theterminal equipment according to received signaling.

In one implementation, the functions of the apparatus 600 in Embodiment3 may be integrated into the central processing unit 801 of the terminalequipment 800. The central processing unit 801 may be configured tocarry out the method for transmitting data of vehicle communication(V2X) services described in Embodiment 1.

For example, the central processing unit 801 may be configured toperform control, such that the terminal equipment 800 carries out themethod described in Embodiment 1.

Furthermore, reference may be made to Embodiment 1 for otherconfiguration methods of the central processing unit 801, which shallnot be described herein any further.

In another implementation, the apparatus 600 and the central processingunit 801 may be configured separately; for example, the apparatus 600may be configured as a chip connected to the central processing unit801, such as units shown in FIG. 8, and the functions of the apparatus600 are executed under control of the central processing unit 801.

According to this embodiment, the media access control layer of theterminal equipment generates at least one PDU in a way that transmissionmodes to which service data units (SDU) contained in protocol data units(PDU) correspond are identical, hence, the PDU is able to correspond tothe transmission mode, and a physical layer is facilitated to transmitdata in a corresponding transmission mode. And furthermore, in thisembodiment, the terminal equipment determines or sets the transmissionmode according to the indication information, and the layers of theterminal equipment perform corresponding processing, which are simple inimplementation.

Embodiment 6

Embodiment 6 of this disclosure provides a network device. As aprinciple of the network device for solving problems is similar to thatof the method in Embodiment 2, reference may be made to theimplementation of the method in Embodiment 2 for implementation of thisnetwork device, with identical contents being going to be describedherein any further.

FIG. 9 is a schematic diagram of a structure of the network device ofthe embodiment of this disclosure. As shown in FIG. 9, a network device900 may include a central processing unit (CPU) 901 and a memory 902,the memory 902 being coupled to the central processing unit 901. Thememory 902 may store various data, and furthermore, it may store aprogram for data processing, and execute the program under control ofthe central processing unit 901.

In one implementation, the functions of the apparatus 700 may beintegrated into the central processing unit 901. The central processingunit 901 may be configured to carry out the method described inEmbodiment 2.

For example, the central processing unit 901 may be configured toperform control, such that the network device 900 carries out the methoddescribed in Embodiment 2.

Furthermore, reference may be made to Embodiment 2 for otherconfiguration methods of the central processing unit 901, which shallnot be described herein any further.

In another implementation, the apparatus 700 and the central processingunit 901 may be configured separately; for example, the apparatus 700may be configured as a chip connected to the central processing unit901, such as units shown in FIG. 9, and the functions of the apparatus700 are executed under control of the central processing unit 901.

Furthermore, as shown in FIG. 9, the network device 900 may include atransceiver 903, and an antenna 904, etc. Functions of the abovecomponents are similar to those in the related art, and shall not bedescribed herein any further. It should be noted that the network device900 does not necessarily include all the parts shown in FIG. 9.Furthermore, the network device 900 may include parts not shown in FIG.9, and the related art may be referred to.

According to this embodiment, the physical layer is facilitated totransmit data in a corresponding transmission mode. And furthermore,suitable transmission modes of unicast, or groupcast, or broadcast maybe used according to the characteristics of the data to be transmitted,which is conducive to data transmission satisfying their QoS or beingtransmitted to a specific destination, while ensuring high radioresource utilization.

Embodiment 7

Embodiment 7 of this disclosure provides a communication system,including at least the terminal equipment 800 in Embodiment 5 and thenetwork device 900 in Embodiment 6. Contents of Embodiment 5 andEmbodiment 6 are incorporated herein, and shall not be described hereinany further.

According to this embodiment, the media access control layer of theterminal equipment generates at least one PDU in a way that transmissionmodes to which service data units (SDU) contained in protocol data units(PDU) correspond are identical, hence, the PDU is able to correspond tothe transmission mode, and a physical layer is facilitated to transmitdata in a corresponding transmission mode. And furthermore, in thisembodiment, the terminal equipment determines or sets the transmissionmode according to the indication information, and the layers of theterminal equipment perform corresponding processing, which are simple inimplementation.

An embodiment of this disclosure provides a computer storage medium,including a computer readable program code, which will cause anapparatus for transmitting data of vehicle communication (V2X) servicesor a terminal equipment to carry out the method for transmitting data ofvehicle communication (V2X) services described in Embodiment 1.

An embodiment of the present disclosure provides a computer readableprogram code, which, when executed in an apparatus for transmitting dataof vehicle communication (V2X) services or a terminal equipment, willcause the apparatus for transmitting data of vehicle communication (V2X)services or the terminal equipment to carry out the method fortransmitting data of vehicle communication (V2X) services described inEmbodiment 1.

An embodiment of this disclosure provides a computer storage medium,including a computer readable program code, which will cause anapparatus for transmitting data of vehicle communication (V2X) servicesor a network device to carry out the method for transmitting data ofvehicle communication (V2X) services described in Embodiment 2.

An embodiment of the present disclosure provides a computer readableprogram code, which, when executed in an apparatus for transmitting dataof vehicle communication (V2X) services or a network device, will causethe apparatus for transmitting data of vehicle communication (V2X)services or the network device to carry out the method for transmittingdata of vehicle communication (V2X) services described in Embodiment 2.

The above apparatuses and methods of this disclosure may be implementedby hardware, or by hardware in combination with software. Thisdisclosure relates to such a computer-readable program that when theprogram is executed by a logic device, the logic device is enabled tocarry out the apparatus or components as described above, or to carryout the methods or steps as described above. The present disclosure alsorelates to a storage medium for storing the above program, such as ahard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.

The methods carried out in the apparatuses described with reference tothe embodiments of this disclosure may be directly embodied as hardware,software modules executed by a processor, or a combination thereof. Forexample, one or more functional block diagrams and/or one or morecombinations of the functional block diagrams shown in FIGS. 5 and 6 mayeither correspond to software modules of procedures of a computerprogram, or correspond to hardware modules. Such software modules mayrespectively correspond to the steps shown in FIGS. 2 and 4. And thehardware module, for example, may be carried out by firming the softmodules by using a field programmable gate array (FPGA).

The soft modules may be located in an RAM, a flash memory, an ROM, anEPROM, and EEPROM, a register, a hard disc, a floppy disc, a CD-ROM, orany memory medium in other forms known in the art. A memory medium maybe coupled to a processor, so that the processor may be able to readinformation from the memory medium, and write information into thememory medium; or the memory medium may be a component of the processor.The processor and the memory medium may be located in an ASIC. The softmodules may be stored in a memory of a mobile terminal, and may also bestored in a memory card of a pluggable mobile terminal. For example, ifequipment (such as a mobile terminal) employs an MEGA-SIM card of arelatively large capacity or a flash memory device of a large capacity,the soft modules may be stored in the MEGA-SIM card or the flash memorydevice of a large capacity.

One or more functional blocks and/or one or more combinations of thefunctional blocks in FIGS. 5 and 6 may be realized as a universalprocessor, a digital signal processor (DSP), an application-specificintegrated circuit (ASIC), a field programmable gate array (FPGA) orother programmable logic devices, discrete gate or transistor logicdevices, discrete hardware component or any appropriate combinationsthereof carrying out the functions described in this application. Andthe one or more functional block diagrams and/or one or morecombinations of the functional block diagrams in FIGS. 5 and 6 may alsobe realized as a combination of computing equipment, such as acombination of a DSP and a microprocessor, multiple processors, one ormore microprocessors in communication combination with a DSP, or anyother such configuration.

This disclosure is described above with reference to particularembodiments. However, it should be understood by those skilled in theart that such a description is illustrative only, and not intended tolimit the protection scope of the present disclosure. Various variantsand modifications may be made by those skilled in the art according tothe principle of the present disclosure, and such variants andmodifications fall within the scope of the present disclosure.

Following supplements are further provided in this disclosure.

1. An apparatus for transmitting data of vehicle communication (V2X)services, configured in a terminal equipment, the apparatus including:

a first generating unit configured in a media access control (MAC) layerof the terminal equipment and configured to generate at least oneprotocol data unit (PDU) in a way that transmission modes to whichservice data units (SDU) contained in a PDU correspond are identical;and

a first transmitting unit configured in the MAC layer and configured totransmit the PDU to a physical layer of the terminal equipment, andnotify the transmission mode to which the PDU corresponds to thephysical layer.

2. The apparatus according to supplement 1, wherein,

the transmission mode includes unicast, or groupcast, or broadcast.

3. The apparatus according to supplement 1, wherein the apparatusfurther includes:

a first determining unit configured in an upper layer of the terminalequipment and configured to determine the transmission mode.

4. The apparatus according to supplement 3, wherein,

the first determining unit indicates data packets of the V2X servicesand a transmission mode to which the data packets of the V2X servicescorrespond.

5. The apparatus according to supplement 4, wherein the apparatusfurther includes:

a first mapping unit configured in a packet filter of the terminalequipment and configured to map the data packets onto quality of service(QoS) flows; and wherein transmission modes to which data packets in aQoS flow correspond are identical.

6. The apparatus according to supplement 4, wherein the apparatusfurther includes:

a second mapping unit configured in a service data adaptation protocol(SDAP) layer of the terminal equipment and configured to map the QoSflows or the data packets of the V2X services onto data radio bearers(DRBs); wherein transmission modes to which QoS flows or data packets ofthe V2X services on a DRB correspond are identical.

7. The apparatus according to supplement 4, wherein the apparatusfurther includes:

a third mapping unit configured in a packet data convergence protocol(PDCP) layer of the terminal equipment and configured to map the QoSflows or the data packets of the V2X services onto data radio bearers(DRBs); wherein transmission modes to which QoS flows or data packets ofthe V2X services on a DRB correspond are identical.

8. The apparatus according to supplement 3, wherein,

the packet filter of the terminal equipment maps the data packets ontothe quality of service (QoS) flows; and wherein transmission modes towhich data packets in a QoS flow correspond are identical;

and the first determining unit is configured in the packet filter, and atransmission mode to which the QoS flows correspond is determined by thefirst determining unit.

9. The apparatus according to supplement 1, wherein the apparatusfurther includes:

a second determining unit configured in an access stratum of theterminal equipment and configured to determine the transmission mode.

10. The apparatus according to supplement 9, wherein,

the second determining unit is configured in the service data adaptationprotocol (SDAP) layer, or the packet data convergence protocol (PDCP)layer, or a radio link control (RLC) layer, or the media access control(MAC) layer, of the terminal equipment, and configured to determine thetransmission mode.

11. The apparatus according to supplement 10, wherein,

the second determining unit is configured in the service data adaptationprotocol (SDAP) layer,

and the second determining unit determines the transmission modes towhich the QoS flows or data packets of the V2X services correspond, andthe service data adaptation protocol (SDAP) layer maps the QoS flows ordata packets of the V2X services onto data radio bearers (DRBs); whereintransmission modes to which QoS flows or data packets of the V2Xservices on a DRB correspond are identical; or

the service data adaptation protocol (SDAP) layer maps the QoS flows ordata packets of the V2X services onto data radio bearers (DRBs), and thesecond determining unit determines transmission modes to which the DRBscorrespond.

12. The apparatus according to supplement 10, wherein,

the second determining unit is configured in the packet data convergenceprotocol (PDCP) layer and configured to determine the transmission modesto which the DRBs correspond, or transmission modes to which radio linkcontrol (RLC) channels correspond, or transmission modes to whichlogical channels correspond, the DRBs corresponding to the RLC channelsand the logical channels.

13. The apparatus according to supplement 10, wherein,

the second determining unit is configured in the radio link control(RLC) layer and is configured to determine transmission modes to whichradio link control (RLC) channels correspond or transmission modes towhich logical channels correspond.

14. The apparatus according to supplement 10, wherein,

the second determining unit is configured in the media access control(MAC) layer and is configured to determine the transmission modes towhich the logical channels correspond or the transmission mode to whichthe PDU corresponds.

15. The apparatus according to supplements 3-14, wherein the apparatusfurther includes:

a second transmitting unit configured in a higher layer of the terminalequipment and configured to notify the transmission modes to a lowerlayer; or

a marking unit configured to mark the transmission modes to which thedata packets of the V2X services, and/or the QoS flows, and/or the dataradio bearers (DRBs), and/or the radio link control (RLC) channels,and/or the logical channels correspond.

16. The apparatus according to any one of supplements 3-15, wherein theapparatus further includes:

a first notifying unit configured to notify the transmission modes to anetwork device.

17. The apparatus according to supplement 16, wherein,

the first notifying unit notifies the transmission modes to the networkdevice via a sidelink UE information radio resource control (RRC)message, or a sidelink buffer status report (BSR), or a schedulingrequest (SR).

18. The apparatus according to supplement 1, wherein the apparatusfurther includes:

a first setting unit configured to set the transmission modes accordingto indication information used for configuring or indicating thetransmission modes;

and wherein the indication information is provided by a network deviceof a core network, or a network device of an access network, or isprovided by a roadside unit (RSU), or is preconfigured.

19. The apparatus according to supplement 18, wherein,

the indication information provided by the network device of the corenetwork is used to configure transmission modes to which data packets ona sidelink and/or the QoS flows correspond.

20. The apparatus according to supplement 18, wherein,

the indication information provided by the network device of the accessnetwork is used to configure the transmission modes to which the DRBs onthe sidelink and/or the RLC channels and/or the logical channelscorrespond.

21. The apparatus according to supplement 18, wherein,

the indication information provided by the network device of the accessnetwork contains transmission modes to which scheduled sidelink datacorrespond.

22. The apparatus according to supplement 18, wherein,

the pre-configured indication information is used to configuretransmission modes to which data packets on a sidelink and/or the QoSflows and/or the DRBs and/or the RLC channels and/or the logicalchannels correspond.

23. The apparatus according to any one of supplements 1-22, wherein,

the transmission modes are determined based on QoS characteristicsand/or QoS grade indication of to-be-transmitted data, and/or a targetterminal equipment to which the data are transmitted, and/or contents ofinformation contained in the data, and/or a geographical location of theterminal equipment.

24. The apparatus according to supplement 23, wherein,

the QoS characteristics include: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data;

and the contents of information contained in the data include: a roadcondition, and/or environment, and/or information on an event, orinclude: a service request, and/or feedback, or group commoninformation.

25. An apparatus for transmitting data of vehicle communication (V2X)services, configured in a network device, the apparatus including:

a second generating unit configured to generate indication informationused for configuring or indicating transmission modes for transmittingdata of a terminal equipment; and

a third transmitting unit configured to transmit the indicationinformation to the terminal equipment;

wherein the network device is a network device of a core network, or anetwork device of an access network.

26. The apparatus according to supplement 25, wherein,

when the network device is a network device of a core network, theindication information is used for configuring transmission modes towhich data packets and/or QoS flows on a sidelink correspond.

27. The apparatus according to supplement 25, wherein,

when the network device is a network device of an access network, theindication information is used for configuring transmission modes ofDRBs on a sidelink and/or RLC channels and/or logical channels.

28. The apparatus according to supplement 25, wherein,

when the network device is a network device of a core network, theindication information contains transmission modes to which scheduledsidelink data correspond.

29. An apparatus for determining a transmission mode of data in vehiclecommunication (V2X) services, including:

a first receiving unit configured to receive a notification of atransmission mode of data of a terminal equipment transmitted by theterminal equipment.

30. The apparatus according to supplement 29, wherein,

the first receiving unit receives the notification via a sidelink UEinformation radio resource control (RRC) message, or a sidelink bufferstatus report (BSR), or a scheduling request (SR).

31. The apparatus according to any one of supplements 25-30, wherein,

in the indication information generated by the second generating unit,or in the notification receive by the first receiving unit,

the transmission mode is determined based on QoS characteristics and/orQoS grade indication of to-be-transmitted data, and/or a target terminalequipment to which the data are transmitted, and/or contents ofinformation contained in the data, and/or a geographical location of theterminal equipment.

32. The apparatus according to supplement 31, wherein,

the QoS characteristics include: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data;

and the contents of information contained in the data include: a roadcondition, and/or environment, and/or information on an event, orinclude: a service request, and/or feedback, or group commoninformation.

33. A communication system, including a network device and a terminalequipment;

wherein the network device includes the apparatus as described in anyone of supplements 25-32, and the terminal equipment includes theapparatus as described in any one of supplements 1-24.

34. A communication system, comprising a network device and a terminalequipment;

wherein the network device comprises an apparatus for transmitting dataof vehicle communication (V2X) services, configured in the networkdevice, the apparatus comprising:

-   -   processor circuitry configured to generate indication        information used for configuring or indicating transmission        modes for transmitting data of a terminal equipment; and    -   transmitter circuitry configured to transmit the indication        information to the terminal equipment;

wherein the network device is a network device of a core network, or anetwork device of an access network; and

the terminal equipment comprises an apparatus for transmitting data ofV2X services, configured in the terminal equipment, the apparatuscomprising:

-   -   processor circuitry configured in a media access control (MAC)        layer of the terminal equipment and configured to generate at        least one protocol data unit (PDU) in a way that transmission        modes to which service data units (SDU) contained in a PDU        correspond are identical; and

transmitter circuitry configured in the MAC layer and configured totransmit the PDU to a physical layer of the terminal equipment, andnotify the transmission mode to which the PDU corresponds to thephysical layer.

What is claimed is:
 1. An apparatus for transmitting data of vehiclecommunication (V2X) services, configured in a terminal equipment, theapparatus comprising: a first generating unit configured in a mediaaccess control (MAC) layer of the terminal equipment and configured togenerate at least one protocol data unit (PDU) in a way thattransmission modes to which service data units (SDU) contained in a PDUcorrespond are identical; and a first transmitter configured in the MAClayer and configured to transmit the PDU to a physical layer of theterminal equipment, and notify the transmission mode to which the PDUcorresponds to the physical layer.
 2. The apparatus according to claim1, wherein, the transmission mode comprises unicast, or groupcast, orbroadcast.
 3. The apparatus according to claim 1, wherein the apparatusfurther comprises: a first determining unit configured in an upper layerof the terminal equipment and configured to determine the transmissionmode, wherein the upper layer is a V2X layer.
 4. The apparatus accordingto claim 3, wherein, the first determining unit indicates data packetsof the V2X services and a transmission mode to which the data packets ofthe V2X services correspond.
 5. The apparatus according to claim 4,wherein the apparatus further comprises: a first mapping unit configuredin a packet filter of the terminal equipment and configured to map thedata packets onto quality of service (QoS) flows; and whereintransmission modes to which data packets in a QoS flow correspond areidentical.
 6. The apparatus according to claim 4, wherein the apparatusfurther comprises: a second mapping unit configured in a service dataadaptation protocol (SDAP) layer of the terminal equipment andconfigured to map the QoS flows or the data packets of the V2X servicesonto data radio bearers (DRBs); wherein transmission modes to which QoSflows or data packets of the V2X services on a DRB correspond areidentical.
 7. The apparatus according to claim 4, wherein the apparatusfurther comprises: a third mapping unit configured in a packet dataconvergence protocol (PDCP) layer of the terminal equipment andconfigured to map the QoS flows or the data packets of the V2X servicesonto data radio bearers (DRBs); wherein transmission modes to which QoSflows or data packets of the V2X services on a DRB correspond areidentical.
 8. The apparatus according to claim 1, wherein the apparatusfurther comprises: a second transmitter configured in an access stratumof the terminal equipment and configured to determine the transmissionmode.
 9. The apparatus according to claim 3, wherein the apparatusfurther comprises: a first notifying unit configured to notify thetransmission modes to a network device.
 10. The apparatus according toclaim 9, wherein, the first notifying unit notifies the transmissionmodes to the network device via a sidelink UE information radio resourcecontrol (RRC) message, or a sidelink buffer status report (BSR), or ascheduling request (SR).
 11. The apparatus according to claim 1, whereinthe apparatus further comprises: a first setting unit configured to setthe transmission modes according to indication information used forconfiguring or indicating the transmission modes; and wherein theindication information is provided by a network device of a corenetwork, or is provided by a network device of an access network, or isprovided by a roadside unit (RSU), or is preconfigured.
 12. Theapparatus according to claim 11, wherein, the indication informationprovided by the network device of the core network is used to configuretransmission modes to which data packets on a sidelink and/or the QoSflows correspond.
 13. The apparatus according to claim 11, wherein, theindication information provided by the network device of the accessnetwork is used to configure the transmission modes to which the DRBs onthe sidelink and/or the RLC channels and/or the logical channelscorrespond.
 14. The apparatus according to claim 11, wherein, theindication information provided by the network device of the accessnetwork contains transmission modes to which scheduled sidelink datacorrespond.
 15. The apparatus according to claim 1, wherein, thetransmission modes are determined based on QoS characteristics and/orQoS grade indication of to-be-transmitted data, and/or a target terminalequipment to which the data are transmitted, and/or contents ofinformation contained in the data, and/or a geographical location of theterminal equipment.
 16. The apparatus according to claim 15, wherein,the QoS characteristics comprise: priorities of the data, and/or latencyof the data, and/or reliabilities of the data, and/or data rates of thedata, and/or a communication range of the data; and the contents ofinformation contained in the data comprise: a road condition, and/orenvironment, and/or information on an event, or comprise: a servicerequest, and/or feedback, or group common information.
 17. An apparatusfor transmitting data of vehicle communication (V2X) services,configured in a network device, the apparatus comprising: a secondgenerating unit configured to generate indication information used forconfiguring or indicating transmission modes for transmitting data of aterminal equipment; and a transmitter configured to transmit theindication information to the terminal equipment; wherein the networkdevice is a network device of a core network, or a network device of anaccess network.
 18. The apparatus according to claim 17, wherein, thetransmission mode comprises unicast, or groupcast, or broadcast.
 19. Theapparatus according to claim 17, wherein, when the network device is anetwork device of an access network, the indication information is usedto configure the transmission mode for a sidelink DRB.
 20. Acommunication system, comprising a network device and a terminalequipment; wherein the network device comprises an apparatus fortransmitting data of vehicle communication (V2X) services, configured inthe network device, the apparatus comprising: processor circuitryconfigured to generate indication information used for configuring orindicating transmission modes for transmitting data of a terminalequipment; and transmitter circuitry configured to transmit theindication information to the terminal equipment; wherein the networkdevice is a network device of a core network, or a network device of anaccess network; and the terminal equipment comprises an apparatus fortransmitting data of V2X services, configured in the terminal equipment,the apparatus comprising: processor circuitry configured in a mediaaccess control (MAC) layer of the terminal equipment and configured togenerate at least one protocol data unit (PDU) in a way thattransmission modes to which service data units (SDU) contained in a PDUcorrespond are identical; and transmitter circuitry configured in theMAC layer and configured to transmit the PDU to a physical layer of theterminal equipment, and notify the transmission mode to which the PDUcorresponds to the physical layer.